Volkswagen’s “261-mpg,” range-topping, limited-production, diesel plug-in hybrid wundercar is either hyperbole or one extreme hypermiler, or maybe the truth is somewhere in the middle. Even with careful driving, real world mileage from the XL1 is said to sometimes plummet to less than 50-percent of VW’s exalted claim, according to Automobile magazine. The mystical European concept […]

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